rockxdude :
Which one from these two?
Both looks good to me...
The padded one is strictly intended to be used on the lap, and one feedback on Newegg says:
"...padded bottom keeps your lap comfortable."
The Zalman one has bottom that has 4 (or more) rubber anti-slip feets, so I would say its primary purpose is on a flat surface.
BUT, you should check out all the Newegg listings for "laptop cooler". There are TONS of this kind of stuff. Look for a padded one for lap use.